CVE-2026-75827: critical vulnerability in getgrav grav
Grav before 2.0.15 Arbitrary File Write via error_log
Published · Updated
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48Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 9.3epss 0.9%
from disclosure to weapon31 days
Published on NVDAug 18
1st PoC+31d
Grav before 2.0.15 contains an arbitrary file write vulnerability in the Blueprint dynamic-data bare-function validation that uses an incomplete denylist instead of a positive allowlist. Attackers with page-edit or blueprint-config access can invoke the error_log function through a data directive to append PHP payloads to web-accessible files, achieving remote code execution.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
getgrav · gravpublic PoCs found — 1
githubgithub.com/abraxas/CVE-2026-75827★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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